氨制冷系统经长时间运行,管道焊接部位常出现漏氨现象(主要与焊接质量有关)。过去按惯例对漏氨的处理办法是:把该部份的氨处理掉,然后接通大气,进行焊接处理(焊接前还要得到上级安技部门的许可,焊工必须有压力容器焊接操作证)。焊好后进行试压,抽空。用这样的方法处理不但时间长,浪费了人力和物力,并且在经济上也会造成较大损失。我厂在生产旺季曾多次出现过这种现象,我们经过不断摸索,找到了简 Ammonia refrigeration system running for a long time, pipe welding often leak ammonia phenomenon (mainly related to the quality of welding). Traditionally used to deal with ammonia leakage is: the part of the ammonia dealt with, and then connected to the atmosphere, the welding process (prior to welding but also get permission from the higher security sector, the welder must have a pressure vessel welding operation permit) . After welding good pressure test, taking the time. Using such a method not only takes a long time, but also istes human and material resources, and it also causes great economic losses. I plant in the production season has repeatedly appeared in this phenomenon, we continue to grope to find Jane